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Search Results: 1 - 10 of 198062 matches for " N.Abolfazli "
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A comparative Survey on the Effect of Enamel Matrix Protein in Treatment of Two Wall Intrabony Periodontal Defects (Alone or in Combination with Autogenous Bone Graft)
Journal of Dental Medicine , 2005,
Abstract: Statement of Problem: Regenerative periodontal procedures are one mode of therapy that attempts to restore the lost supporting structures of the dentition around a previously diseased root surface.Purpose: The purpose of this study was comparison between Enamel matrix proteins (EMP) used alone or in combination with autogenous bone graft (ABG) in the treatment of human intrabony periodontal defects.Materials and Methods: This clinical trial study, was done on 8 pairs of matched two wall intrabony periodontal defects with 5 mm or more probing depth and 3 mm or more depth of intrabony componentfollowing phase I therapy. In control sites Enamel matrix proteins (EMP) and in lest sites EMP with autogenous bone graft (ABG) was used.Results: No differences were found in terms of oral hygiene and defect characteristics, at baseline. Six months after treatment, both procedures significantly improved the clinical probing depth and clinical attachment level. Although bone fill was significant for both groups but EMP+ABG significantly showed more bone fill and defect resolution (bone fill 2.75mm versus 3.67mm). Crestal resorption was the same for both groups and its difference was not significant.Conclusion: The results of this study demonstrates that both procedures improves clinical parameters and combined use of EMP with autogenous bone graft will promote more bone fill and more defect resolution. A difficulty in obtaining sufficient amounts of autogenous bone from intra oral sites is one of the limitations ofthis procedure.
The Impact of Clinical Steps of Porcelain Fused to Metal Restorations on Periodontal Health
Saleh Saber F.,Abolfazli N.
Journal of Dentistry , 2011,
Abstract: Statement of Problem: Periodontal health plays a key role in the success of restorative treatment and clinical stages of restorative treatments may affect the health of periodontium.Purpose: The aim of the present study was to investigate the effects of clinical stages of porcelain fused to metal (PFM) restorations on free gingival margin (FGM), clinical attachment level (CAL), plaque (PI), and gingival (GI) indices.Material and Method: 15 patients requiring PFM restoration on the maxillary central incisor or maxillary and mandibular premolars (test group) with an intact adjacent counterpart (control group) were selected. FGM, CAL, PI, and GI were measured and recorded at baseline (0), after preparation (1), after impression (2), after final cementation (3), 7 days after cementation (4), 1 & 6 months after cementation (5 &6). Independent Sample T-test and Man-Whitney U Test were used for comparison of intra-group and inter-group differences, respectively. Results: Statistically significant differences were seen between the test and control groups in FGM (3), CAL (2, 3 and 6), and GI (6). In the test group, significant differences were observed in FGM (1-3), CAL (1-6), and GI (3 and 6) compared to the baseline. In the control group, however, the variables did not show any significant difference compared to the baseline except for PI (4-6) and GI (6). Conclusion: The findings of the present study indicated that clinical stages of making porcelain fused to metal (PFM) restorations were accompanied by a significant loss of clinical attachment level, increase in GI, and deepening of the gingival sulcus.
A clinical stydy on the effectiveness of slow - resorbing collagen membrane barrier therapy to guide regeneration in mandibular class II furcations in human
Khoshkhoonejad A,Miremadi A,Abolfazli N
Journal of Dental Medicine , 1998,
Abstract: The present clinical trial was designed to evaluate the regenerative potential of periodontal tissues in degree II"nfurcation defects at mandibular molars of human using a slow-resorbing collagen membrane and a surgical treatment"ntechnique based on the principles of guided tissue regeneration."nThe patient sampleinclude 8 subjects who had periodontal lessions in right and left mandibular molars regions, including moderate to advance periodonal destruction within the radicular area. Following a baseline examination including recording the clinical measurements (PD, Al, HC, F.G.M) , the furcation- involved molars were randomly assigned in each patient to either a test or a control treatment procedure. Included the evevation of mucoperiosteal flaps, recording measurement from the cemento enamel junction (C.E.J) directly coronal to the furcation area to the alveolar crest and to the base of the defect-Horizontal furcation measurements were also made using a William's probe, finally a collagen membrrane placed on the involved area to cover the entrance of the furcation and adjucent root surfaces as well as a portion of the alveolar bone apical to the crest. The flaps were repositioned and secured with interdental sutures. A procedure identical to the one used at the test teeth was Performed at the control teeth region with the exception of the placement of the collagen membrance. Following surgery all patients were placed on a plaque control regimen. All Patients received normal postsurgical care and at 6 month post-surgery were scheduled for re-entry surgery. Before re-entry surgery all clinical parameters recorded again. The re-entry mucoperiosteal flaps were designed to expose the furcation area for measurements, as describedabove. There was clinical improvement in all measurements made in both the test and control patients (especially in test group) over the 6 month period. The horizontal and vertical furcation measurements did yield a statistically significant imporvement when companing the test patients to the control.
Reproducibility of keratinized gingival width assessment with three methods of mucogingival junction determination
Abolfazli N.,Saleh Saber F.,Lafzi A
Journal of Dental Medicine , 2005,
Abstract: Background and Aim: Although the need for "adequate" amount of keratinized tissue (KT) for periodontal health is questionable, the mucogingival junction (MGJ) often serves as a measurement landmark in periodontal evaluations. Limited information is available on the reproducibility of KT width (KTW) assessment. The purpose of this study was to assess reproducibility of 3 different methods to identify MGJ location. Materials and Methods: In this test evaluation study, fourteen patients contributed with 40 teeth. At the midbuccal aspect of each tooth, KTW was assessed by 2 independent examiners after MGJ identification by the visual (VM), functional (FM), and visual with histochemical staining (HM) method. Data analysis was based on intra-class correlation coefficients (ICC) and paired t test. Results: The results of this study exhibits no significant differences in keratinized tissue width assessment in visual and histochemical methods , but a significant difference in functional method is found. Intra- and inter-examiner reproducibility has been shown to be substantially consistent when different methods of mucogingival junction determination are used to measure in order to determining corono apical dimension of the gingival. Conclusion: Finally the results of this study indicate that all three methods for detecting MGJ location are accurate and reproducible, but if we need more accuracy and reproducibility, the histochemical method is recommended.
A Study On The Results Of Competing Sentence Test In Patients With Cerebrovascucular Accident
Abolfazli R,Makari N,Bagheri H
Tehran University Medical Journal , 2004,
Abstract: Background: Cerebrovasular diseases (CVD) are one of the most common anomalies which may affect on auditory cortex. In this research we have tried to evaluate the function of CANS in a group of 50-70 years old cerebrovascular accident (CVA) patients without hearing problem by using Persian version of C.S.T. Materials and Methods: This cross-sectional analytic study was established at Loghman-e-Hakim Hospital on a group of 30 normal subject (15 male, 14 female) and a group of 40 patients with CVA including 30 patients (16 male, 14 female) with abnormal CT scan and 10 patients with normal CT scan. Results: Routine audiologic test including: Pure tone audiometry, Immitance audiometry and speech audiometry were nearly normal in all cases. There were significant differences between mean scores of CST in the patients with CVA and control group (P 0.05). In spite of nearly normal hearing and high scores in the simple speech tests such as SDS, there were significant differences in mean scores of CST in both ears of CVA patients (P< 0.05). Another important point is that in some of patients with CVA. Conclusion: Although common radiologic evaluations such as CT scan showed no anatomic or structural anomaly but central auditory assessments such as CST can show dysfunctions of CANS. Therefore, CST might be a valuable test in CANS batteries for the cerebrovascular diseases.
Learners’ Starting Age of Learning EFL and Use of Language Learning Strategies
Karim Sadeghi,Zainab Abolfazli Khonbi
English Language Teaching , 2013, DOI: 10.5539/elt.v6n1p28
Abstract: This study investigated the use of language learning strategies (LLS) and reasons for learning English among Iranian EFL students who began learning English at different ages. The participants (N = 33, both male and female) were divided into two groups of younger beginners (who began learning English before age 9; N = 16) and older beginners (who began learning English at or after age 12; N = 17). They were invited to complete Oxford’s (1990) Strategy Inventory for Language Learning (SILL) questionnaire and to take part in a structured interview. While the students’ choices of LLS were identified both through the questionnaire and interviews, their reasons for strategy use and their goals in learning English were determined using the interviews alone. Data analysis indicated that there were differences in LLS categories employed by the groups. Further findings and implications are discussed in the paper.
Effects of phosphorus and organic fertilizers on phosphorus fractions in submerged soil
Abolfazli,F; Forghani,A; Norouzi,M;
Journal of soil science and plant nutrition , 2012, DOI: 10.4067/S0718-95162012000200014
Abstract: this study was conducted in order to evaluate effects of phosphorous fertilizer (pf)s from sources of triple superphosphate (tsp) and di-ammonium phosphate (dap) and organic fertilizer (of)s from sources of cow dung manure (cdm) and municipal solid waste compost (mswc) on phosphorous (p) fractions include aluminium-p (al-p), iron-p (fe-p), reductant soluble-p (rs-p), calcium-p (ca-p) and avail-able-p (olsen-p) fractions under rice cultivation condition. the trials were carried out in calcareous and acidic soils. pfs were added at three levels (10, 20 and 30 mg kg-1) and ofs was applied at the rate of 10 t.ha-1. results of this study showed that ca-p was the predominant form of p in calcareous soil while fe-p and al-p were predominate in acidic soils. in calcareous soil, all forms of p under submerged conditions had been increased because of using pfs both alone and in combination with ofs. in acidic soil, significant amounts of p fractions were found only in fe-p and rs-p fractions. accordingly, fe-p fraction increased in 10 mg kg-1 treatment and rs-p increased in mswc treatment. among the inorganic p fractions in calcareous soil, only rs-p; and in acidic soil, ca-p and fe-p significantly correlated to olsen-p.
The effects of polarity of click stimulation on auditory brainstem responses (ABR) in patients with cochlear and retro-cochlear disorders in Amiralam and Resalat Hospitals 1995-97
Abolfazli R,Bagheri H,Soltani AH
Tehran University Medical Journal , 2002,
Abstract: Background: Auditory brainstem response (A.B.R) is one of the most important electrophysiological tests in evaluating of auditory system, especially for diagnosing of auditory nerve and brainstem disorders. It is a non-invasive test and has reliability and validity characteristic. There is no contra-indication for this test. One of the most important of stimulation parameters of A.B.R is click polarity (rarefaction, condensation and alternative). Some of the investigators believed that different polarities have no effects on A.B.R are affected by different polarities. Materials and Methods: In this study, the results of ABR of 148 patients (296 ears) were compared with three different polarities of rarefaction, condensation and alternative half click stimuli. The cases were categorized in three groups of normal (60 cases), cochlear (62 cases) and retro-cochlear (17 cases). This classification were done according to the hearing level in pure tone audiometry results in three frequencies of 1000, 2000, 4000 Hz and to the site of the their disorders. The mean absolute latencies of waves I, III and V were obtained for each polarity. Inter-peak latency (I.P.L) of wave also measured in three groups (normal, cochlear and retro-cochlear). Results: The results were showed a significant difference between absolute latency of wave I among different polarities on three above mentioned groups (P0.05). Conclusion: It was concluded that rarefaction polarity has better and more stable results of ABR tests.
Endocarditis Prophylaxis in Cardiac Patients: Knowledge among General Dental Practitioners in Tabriz
Amir Eskandari,Nader Abolfazli,Ardeshir Lafzi
Journal of Dental Research, Dental Clinics, Dental Prospects , 2008,
Abstract: Background and aims. Dental procedures injuring oral tissues may induce bacterial release to blood stream that can cause infective endocarditis in susceptible patients. The aim of this study was to determine the level of knowledge of general dental practitioners (GDPs) in Tabriz, Northwest of Iran, regarding endocarditis prophylaxis in cardiac patients receiving dental treatments. Materials and methods. This was a cross-sectional, descriptive, analytical study that included 150 GDPs. All practitioners were given a self-administered questionnaire which consisted of three parts assessing their knowledge of cardiac diseases requiring prophylaxis, dental procedures requiring prophylaxis, and antibiotic regimen for endocarditis prophylaxis. Statistical analysis of data was carried out using independent t-test, one-way ANOVA and chi-square test. Results. The level of knowledge among GDPs in three areas of cardiac diseases requiring prophylaxis, dental procedures requiring prophylaxis, and antibiotic regimen for endocarditis prophylaxis were 63.7%, 66.8% and 47.7%, respectively. Their overall level of knowledge regarding endocarditis prophylaxis was 59%. Association of the level of knowledge with age and practice period was statistically significant (P < 0.05). However, the level of knowledge was not significantly associated with gender or university of graduation in either of three areas evaluated (P > 0.05). Conclusion. According to our results, the knowledge of endocarditis prophylaxis among GDPs in Tabriz was in a moderate level. Regarding the importance of endocarditis prophylaxis in susceptible patients, it should be more emphasized in the curriculum of dental schools and continuing dental education programs.
Assessment of the etiologic factors of gingival recession in a group of patients in Northwest Iran
Ardeshir Lafzi,Nader Abolfazli,Amir Eskandari
Journal of Dental Research, Dental Clinics, Dental Prospects , 2009,
Abstract: Background and aims. Gingival recession (GR), a common problem in periodontium, is associated with various etiologic factors. There is controversy over the role and importance of these factors. The aim of this study was to evaluate the etiologic factors of GR in a group of subjects in Northwest Iran. Materials and methods. In this case-control study, patients referring to a university clinic (123 patients with GR and 123 patients without GR) were evaluated. Patients were examined by an experienced periodontist. A checklist assessing the history of systemic disease, smoking, radiotherapy, orthodontic treatment, chemical and mechanical trauma, tooth-brushing method, type of occlusion, axial inclination of tooth, width and thickness of keratinized gingiva, presence of calculus, prosthesis, faulty restorations and food impaction, and frenum pull was completed for each patient. Chi-square test was used for data analysis. Results. Presence of calculus was significantly associated with GR in the evaluated patients (P = 0.000). Low width and thickness of keratinized gingiva, smoking and traumatic tooth brushing were other significant factors (P < 0.05). The type of occlusion, axial inclination of teeth, existence of prosthesis, frenal attachment, and chemical trauma were not significantly associated with GR in the evaluated patients (P > 0.05). Conclusions. Supra- and sub-gingival calculus, inadequate width and thickness of keratinized tissue, and incorrect tooth brushing techniques are most important etiologic factors of GR. Oral hygiene instructions including correct tooth brushing techniques as well as scaling and root planing with periodic recalls can play a significant role in prevention of GR.
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